Removal of cadmium from aqueous solutions by wheat bran and sunflower shell

Abstract EN

In this work two agricultural sorbents wheat bran and sunflower shell were examined to remove Cd (II) from synthetic solutions in a batch experimental setup.

The effect of pH of the solution, initial concentration of metal ion and sorbent dose were investigated.

(150 min) of adsorption time was found sufficient to reach equilibrium for cadmium ion on both adsorbents wheat bran and sunflower shell.

The Freundlich, and Langmuir isotherm were employed and their isotherm constants were calculated at 25 ˚C.

Adsorption of metal ions, are pH dependent, and the results indicate that the optimum pH for the removal of Cd (II) was found to be 7.0 for both wheat bran and sunflower shell.

The percentage of adsorption was found to be 95.7 % and 94.9 % on wheat bran and sunflower shell respectively at initial concentration of 50 mg / L and would be higher with higher initial concentration.